/**
 * 
 */
package com.jiang.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


/**
 * @author Administrator
 * @验证后台未登录的时候的过滤器
 */
@WebFilter(filterName = "backAdminFilter", urlPatterns = { "/pages/back/*" })
public class BackAdminFilter implements Filter {

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {

	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {

		// 验证是否登录过，没登录过要跳转到登录页
		HttpServletRequest _request = (HttpServletRequest) request;
		HttpServletResponse _response = (HttpServletResponse) response;
		HttpSession session = _request.getSession();
		Object badminAid = session.getAttribute("badmin");
		if (badminAid != null) {
			chain.doFilter(_request, _response);
		} else {
			_request.setAttribute("msg", "您还未登录，请先登录!");
			_request.setAttribute("url", "/login.jsp");
			_request.getRequestDispatcher("/pages/forward.jsp").forward(_request, _response);
		}
	}

	@Override
	public void destroy() {

	}

}
